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     2 **

     3 ** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).

     4 ** All rights reserved.

     5 ** Contact: Nokia Corporation (qt-info@nokia.com)

     6 **

     7 ** This file is part of the QtSvg module of the Qt Toolkit.

     8 **

     9 ** $QT_BEGIN_LICENSE:LGPL$

    10 ** No Commercial Usage

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    12 ** You may use this file in accordance with the terms and conditions

    13 ** contained in the Technology Preview License Agreement accompanying

    14 ** this package.

    15 **

    16 ** GNU Lesser General Public License Usage

    17 ** Alternatively, this file may be used under the terms of the GNU Lesser

    18 ** General Public License version 2.1 as published by the Free Software

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    23 **

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    38 ** $QT_END_LICENSE$

    39 **

    40 ****************************************************************************/

    41 

    42 #ifndef QSVGHANDLER_P_H

    43 #define QSVGHANDLER_P_H

    44 

    45 //

    46 //  W A R N I N G

    47 //  -------------

    48 //

    49 // This file is not part of the Qt API.  It exists purely as an

    50 // implementation detail.  This header file may change from version to

    51 // version without notice, or even be removed.

    52 //

    53 // We mean it.

    54 //

    55 

    56 #include "QtXml/qxmlstream.h"

    57 

    58 #ifndef QT_NO_SVG

    59 

    60 #include "QtCore/qhash.h"

    61 #include "QtCore/qstack.h"

    62 #include "qsvgstyle_p.h"

    63 #include "private/qcssparser_p.h"

    64 #include "private/qsvggraphics_p.h"

    65 

    66 QT_BEGIN_NAMESPACE

    67 

    68 class QSvgNode;

    69 class QSvgTinyDocument;

    70 class QSvgHandler;

    71 class QColor;

    72 class QSvgStyleSelector;

    73 class QXmlStreamReader;

    74 

    75 struct QSvgCssAttribute

    76 {

    77     QXmlStreamStringRef name;

    78     QXmlStreamStringRef value;

    79 };

    80 

    81 class QSvgHandler

    82 {

    83 public:

    84     enum LengthType {

    85         LT_PERCENT,

    86         LT_PX,

    87         LT_PC,

    88         LT_PT,

    89         LT_MM,

    90         LT_CM,

    91         LT_IN,

    92         LT_OTHER

    93     };

    94 

    95 public:

    96     QSvgHandler(QIODevice *device);

    97     QSvgHandler(const QByteArray &data);

    98     QSvgHandler(QXmlStreamReader *const data);

    99     ~QSvgHandler();

   100 

   101     QSvgTinyDocument *document() const;

   102 

   103     inline bool ok() const {

   104         return document() != 0 && !xml->hasError();

   105     }

   106 

   107     inline QString errorString() const { return xml->errorString(); }

   108     inline int lineNumber() const { return xml->lineNumber(); }

   109 

   110     void setDefaultCoordinateSystem(LengthType type);

   111     LengthType defaultCoordinateSystem() const;

   112 

   113     void pushColor(const QColor &color);

   114     void pushColorCopy();

   115     void popColor();

   116     QColor currentColor() const;

   117 

   118     void setInStyle(bool b);

   119     bool inStyle() const;

   120 

   121     QSvgStyleSelector *selector() const;

   122 

   123     void setAnimPeriod(int start, int end);

   124     int animationDuration() const;

   125 

   126     void parseCSStoXMLAttrs(QString css, QVector<QSvgCssAttribute> *attributes);

   127 

   128     inline QPen defaultPen() const

   129     { return m_defaultPen; }

   130 

   131 public:

   132     bool startElement(const QString &localName, const QXmlStreamAttributes &attributes);

   133     bool endElement(const QStringRef &localName);

   134     bool characters(const QStringRef &str);

   135     bool processingInstruction(const QString &target, const QString &data);

   136 

   137 private:

   138     void init();

   139 

   140     QSvgTinyDocument *m_doc;

   141     QStack<QSvgNode*> m_nodes;

   142 

   143     QList<QSvgNode*>  m_resolveNodes;

   144 

   145     enum CurrentNode

   146     {

   147         Unknown,

   148         Graphics,

   149         Style

   150     };

   151     QStack<CurrentNode> m_skipNodes;

   152 

   153     /*!

   154         Follows the depths of elements. The top is current xml:space

   155         value that applies for a given element.

   156      */

   157     QStack<QSvgText::WhitespaceMode> m_whitespaceMode;

   158 

   159     QSvgRefCounter<QSvgStyleProperty> m_style;

   160 

   161     LengthType m_defaultCoords;

   162 

   163     QStack<QColor> m_colorStack;

   164     QStack<int>    m_colorTagCount;

   165 

   166     bool m_inStyle;

   167 

   168     QSvgStyleSelector *m_selector;

   169 

   170     int m_animEnd;

   171 

   172     QXmlStreamReader *const xml;

   173     QCss::Parser m_cssParser;

   174     void parse();

   175     void resolveGradients(QSvgNode *node);

   176 

   177     QPen m_defaultPen;

   178     /**

   179      * Whether we own the variable xml, and hence whether

   180      * we need to delete it.

   181      */

   182     const bool m_ownsReader;

   183 };

   184 

   185 QT_END_NAMESPACE

   186 

   187 #endif // QT_NO_SVG

   188 #endif // QSVGHANDLER_P_H